Fig. 1
From: Shaping micro-clusters via inverse jamming and topographic close-packing of microbombs
Packing and jamming of microbombs within micro-confinement. a Illustration of microbombs consisting of an isobutane core and a polymeric shell, which explode and release the isobutane upon heating. b Spontaneous packing and jamming of microbombs inside microwells at a temperature above T g. c Photos of the microbombs in a vial before and after the volumetric expansion. d–g Scanning electron microscopy (SEM) images of the microbombs before (d) and after (f) explosion, and the corresponding transmission electron microscopy (TEM) images showing the shell thickness before (e) and after (g) explosion
